Parents may appreciate using the app as a way to refresh their memories of the works their kids are currently reading (or to get an idea of the work if they've not read it themselves).
The SparkNotes library is extensive, with hundreds of titles available, and includes most high school and college reading lists. Though teachers and parents generally frown on kids using study aids such as SparkNotes without reading the full text, used well these particular resources can help teens better understand and analyze the literature after reading it.